OMG, this picture is mesmerizing!!! And it's really sad to see that people steal others work :/ Believe me, I know how that feels - experienced on myself. But I hope that won't stop you from continuing sharing your amazing work. What I would suggest is maybe to put your copyright logo somewhere on the images..I tried,but i got tired of adding to all my work, but I do think it prevents from the plagiarism. By the way, how do you choose what photos to use for your work?